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      var ret = prompt('请选择要打印的图案\r1.直角三角形 2.等腰三角形 3.九九乘法表 4.日历')*1;
      switch(ret) {
        case 1:
          showZJSJX(row);
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        case 2:
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        case 3:
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        case 4:
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